ISO INTERNATIONAL STANDARD 9664 First edition 1993-05-15 Adhesives - Test methods for fatigue properties of structural adhesives in tensile shear Adhésifs - Méthodes d'essai de tenue a la fatigue d'adhésifs structuraux en traction-cisaillement Reference number ISO 9664:1993(E) No reproduction or networking permitted without license from IHS Not for Resale ISO9664:1993(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work technical committees.Eachmemberbodyinterestedinasubjectfor represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC)on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting avote. International Standard ISO 9664 was prepared by Technical Committee ISO/TC 61, Plastics, Sub-Committee SC 11, Products. Annexes A and B form an integral part of this International Standard. ?ISO1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without per- mission in writing from the publisher. International Organization for Standardization Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii CopyrightInternational Organization for Standardization Noreproductionor networking permited without licensefrom IHS Not for Resale INTERNATIONALSTANDARD ISO9664:1993(E) Adhesives Test methods for fatigue properties of structural adhesives in tensile shear Scope 3.1 shear stress (t): Stress determined by dividing the force by the bonded surface area. ThisInternational Standardspecifiesamethodfores- timating the fatigue strength of adhesives in shear by It is expressed in megapascals (MPa). tension loading, using standardized specimens under specified conditions, with the aim of characterizing 3.2 static shear strength (tp): Average static shear structural adhesives on a given metallic substrate. stressatruptureasdeterminedbyISO4587. The fatigue properties are a function of the specimen It is expressed in megapascals (MPa). geometry. The results do not correspond to intrinsic properties of the adhesive and cannot be used for designpurposes. 3.3 stress cycle: Smallest part of the stress/time function which is repeated at regular intervals. 2 Normative references It is of sinusoidal form (see figure 1) with undulating The following standards contain provisions which, shear. through reference in this text, constitute provisions of this International Standard. At the time of publi- Cyclic stress may be considered to be the superpos cation, the editions indicated were valid. All standards ition of an alternating stress on a static stress which are subject to revision, and parties to agreements isthemeanstress. based on this International Standard are encouraged to investigate the possibility of applying the most re- 3.3.1 maximum stress (tmax): Greatest algebraic cent editions of the standards indicated below. value reached at regular intervals by the stress. Members of IEC and ISO maintain registers of cur- rently valid International Standards. It is expressed in megapascals (MPa). ISO 291:1977. Plastics - Standard atmospheres for conditioning and testing. 3.3.2 minimum stress (tmin): Smallest algebraic value reached at regular intervals by the stress. ISO 4587:1979,Adhesives Determinationof tensile lap-shear strength of high strength adhesive This stress shall always be positive and is expressed bonds. in megapascals (MPa). IsO 4588:1989, Adhesives - Preparation of metal 3.3.3 mean , stress (tm): Albegraic mean of the surfaces